- watchdog - a guardian or defender against theft or illegal practices or waste; "she is the global watchdog for human rights abuses"
--1 is a kind of defender, guardian, protector, shielder
- watchdog, guard dog - a dog trained to guard property
--2 is a kind of working dog
--2 has particulars: kuvasz; attack dog; housedog; schipperke; pinscher - watchdog, guard dog - a dog trained to guard property